Grinding-machine.



F. N. GONNET.

GRINDING MACHINE.

APPLIOATIQN FILED Nov. za, 1907.

Patented June 29, 1909. z sums-SHEET 1.

@wuerden atteinte? I'. N. CONNET.

v GRINDING MACHINE. APPLICATION FILED Nov. 2a. 1907.

Patented June 29, 1909.

2 SHEETS-SHEET 2.

Wi h1 woes attonmn L UNITED STA FREDERICK N. CONNET, OF PROVIDENCE, RHODE ISLAND.

GBINDING-MACHINE.

'Specification of Letters Patent.

Patented June 29, 1909.

Application led November 28, 1907. Serial'No. 408,482.

"['o all A'whom 'it may concern:

chines` and has for its object to provide a grinder of simple and practical construction which is more )articularly adapted and designed to expedite the grinding of'surfaces, the machine being so arranged that work may bcsimply laid upon its table and then pushed through the machine by hand, so that the gri-nt er willqnir-,kly act upon the lower surface of the work. i

The essential feature of the invention is l .that thegrinding ring is supported below the table so that its u per edge is flush with or entendspslightly'above the surface of said table.

Another essential feature of the constructionl is that a rest or support composed of a center table piece is located inside of the grindingring leaving only a narrow slot or. channelthrough which the working surface of the ring projects, by which construction the work is never without-a. guide and support as it is passed through. the machine over the grinding ring.

With these and other objects in View, the invention consists of certain novel features of construction, as will beinore fully described and particularly pointed out in the ap ended claims.

n the accompan ing drawings: Fi re l--is a. top view o my improved mac ine showing the location of the 'grinding ring in the table of the machine.. Fig. 2is a sectional side'elevation of the machine on line 21-2 ofvFi 1. Fig. B-is a central end elevation, par y in section. Fig. --is a. section on line 4--4 of Fig. 1.' F1 5is a perspective view showing the si e guides and center supporting plate. Fig. G--shows a portion of a top View of the and spring. sections and bin ing ring, b

lwhich the grinder is bound and held in position.l Fig. 7-is an enlarged sectional detail showing the binding ring acting on the sections to hold the grindin ringin position.v Fig. S-is a detail si e elevation of the clamping member.`

inding ring j lthe same. Two guide Referring to the drawings, at 1 is the main frame of the machine made preferably in the form of a box, and supported on the base 2. 'Ihe bottom plate 2a of the frame is rovided with an inwardly projecting hol ow boss 3. A short distance down from the upper edge of this frame is located a bearing 4 which is supported by a web or the ribs 5 5. At 6 is an upright shaft supported at its upper end in the bearing 4. The lower end of this shaft rests in the cupshaped bearing 7 which bearing is threaded at 8 at its upper end and adaptedto be adjusted vertically by means of the nut 9 which rests on the top of the boss 3. This vertically adjustable bearing is prevented from turning by the set-screw 10 which enters the groove 11 in the. side thereof. The upper end of this sha t is sup lied with a bearing collar 12 to w ich is olted the bowl-shaped clamping member 13. The upper edge of this member is provided with the rim 14 which is sawed into or split at intervals all around its periphery, thereby providing a plurality of semi-flexible sections. The outer edge of this rim around these sections is beveled as at 15, see F igs.v

7 and 8, and adapted to receive the binding ring 16 which is correspondingly beveled on its interior surface and is adapted to surround these lfingers whereby when the tension bolts 17--17, which are distributed around lthe ring, are set. up said fingersare sprung inward to gri and retain the grinding ring 1S which is located within. In order to provide a vertical adjustment for this grinding ring I'liave constructed an inner plate 19, on which the ring sets, said late being threaded onto the inwardly projecting'hub 20 of the clamping member 13. Supporting tables 21 and 22 may be bolted at 23 and 24 on either side of this frame, which tables may be vertically adjustable, if desired, by means of the set-screws 25 and 26' located at their lower ends. The inner edges 27 and 2S of these tables project inward close to the outer edge of the grinding ring 18 and are shaped to conform toethe circle of said ring so as to set close up to lates 29 and30 extend along on either si e of these adjustable tables and over the edge of the grinding ring, said plates being supported on the up; per edge 31 of the main frame 1, and secured in position by means of the bolts 32- 32. These two guide plates are connected together by means of a center circular table 33 which they are arranged to suppprt,sa1d table beingv adapted `to set down into thecenterl driving belt 37 which leads over the idler pulley 38.

An'exhaust pipe 39 may extend through the'side of the machine, as shown in Fig. 3, which may be connected to an exhaust fan, not shown, for removing the waste material.

This machine is particularly adapted for quickly surfacing rough castmgs, or other work, which may be passed through the ma-v chine by hand.

In operating the machine, the table' 2l is usually made slightly lower than the upper edge of the grinding ring. The center table and table at the opposite end of the machine are usually made about Hush with the top edge of the grinder so that practically all of the work is done by the edge of the ring at the entering end of the machine, but the tables at either side may be adjusted to any height desired so that Work may be entered from either side. It will be seen by this con struction that the work is guided on both edges while being passed through the ma. chine, and that the work is also supported 011 its under-side by both the end tables and the center table while being passed across the face of theriiur, the Working surface of which merely extends through a slot or channel made to receive it. Another feature of this construction is that small Work, or articles,

vmay be' clamped to a yoke and brought into lates 29 and 30 which 7 a ainst its face. In other words, I do not Awish'to be restricted to working-the whole machine in any )articular positionbut only toconiine myseli to the relative positionof the different parts. .The machine is very simple and practical in its construction, effective in its operation, and by its arrangement grinding the faces of castings or the like is greatly facilitated.

Having thus described my invention, what I claim as new and desire to secure by Let.- ters Patent, is: l'. A grinding machine comprising a grinding ring, moans for rotating said ring, a table for Guiding the Work to the ring,.a table for guiding the Work from the. ring, a

work supporting table in the center of said ring, and means for adjusting said center table independent ofsaid ring and said guiding tables.

7 2. A- grinding machine comprising a rinding ring, a supporting table for guidmg the work to said ring, a table in the center of said ring for receiving and supporting the work, a supporting table for guiding the work froln saidring, means for adjusting the tables with relation to the ring, and means for rotating said ring.

3. A grinding machine comprising a grinding ring, a Work supporting table for y guiding the work to said ring, sald ring being supported beneath the face of said table whereby its upper edge may engage the work, a work supporting table in the center of s aid ring, guide platesconnected tov said center table for supporting the same, means for vertically adjusting `said guide plates, and means for rotating said ring.

4. A grinding machine comprising a grinding ring, a work supporting table on either side of said ring, said ring being snp'- po'rted below said table whereby -its upper edge may engage the work, a work supporting .table in the center of said ring, guide plates connected to said center table for supporting the same, means for vertically atljusting both the side and the center tables with relation to the ring, and'means for rotating said ring.

In testimony whereof I aflix my signature in presence of two Witnesses. l

FREDERICK N. CON N ET.

Witnesses VUM. It. TILLiNunAs'r, llowaan ll. lannow. 

